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The 0130M00074 is a genuine OEM high-pressure cut-off switch for the Goodman APH1536M41AC heat pump. Wired into the compressor control circuit, it monitors refrigerant discharge pressure and opens to shut the compressor down if pressure climbs into an unsafe range — protecting the compressor, coil, and refrigerant lines from damage caused by a blocked condenser, dirty coil, or overcharge.
OEM switches are calibrated to Goodman's exact trip and reset pressure setpoints, so the safety behaves as the equipment was designed. Generic switches with the wrong cut-out point can nuisance-trip in normal operation or, worse, fail to protect the compressor. For a safety component, matching the factory setpoint is not optional — always choose OEM.
Moderate (3/5). If the switch mounts on a Schrader-style port it can often be swapped without recovering the charge; a brazed or open-line fitting requires refrigerant recovery and EPA 608 certification. Kill power, verify the control-circuit wiring, and pressure-test after install. Plan 30–45 minutes.
Genuine Goodman part. Confirm your unit's mounting style with info@nationalhvacparts.com before ordering.